MDS PREP
When acrylic resin is packed in the sandy stage, it may result in
1) Open bite
2) Porosity
3) Increased strength
4) All of the above
Prosthodontics
Answer: 2
Packing acrylic resin in the sandy stage, which refers to a stage where the material is not fully polymerized and has a grainy texture, can lead to porosity in the final product. This occurs because the incomplete packing can trap air bubbles, resulting in a porous structure that compromises the strength and integrity of the restoration.
The primary function of the compensating curve, incorporated in complete
dentures, is to provide
1 stability in centric relation
2. balanced occlusion during lateral movements of the mandible
3 an esthetically pleasing denture
4. balancing occlusal contacts during protrusive movements
Prosthodontics
Answer: 4
Explanation: The compensating curve is designed to ensure
that occlusal contacts are balanced during protrusive movements, which is
essential for maintaining stability and function of the complete denture. This
curve helps to distribute occlusal forces evenly and prevents tipping or
dislodgment of the denture during functional movements. The other options do not
accurately reflect the primary purpose of the compensating curve.
In a complete denture, the position of the mandibular first premolar is
determined by the
1. mental foramen
2. adjacent second premolar
3. termination of the mylohyoid ridge
4. mandibular canine
Prosthodontics
Answer: 4
Explanation: In the arrangement of teeth in a complete denture, the
mandibular first premolar is typically positioned with its mesial aspect in
contact with the lateral aspect of the mandibular canine. This is part of the
denture setup to ensure proper occlusal relationships and aesthetics.
Excessive vertical dimension (decreased interocclusal distance) results in
1. Improper retention of the denture
2. Senile appearance of face
3. Sagging of the corners of the mouth
4. Trauma to the residual ridges
Prosthodontics
Answer: 4
Excessive vertical dimension (decreased interocclusal distance) results in trauma to the residual ridges.
As lower denture settles down due to ridge resorption, the effect is a
1. Prominent chin
2. Receded chin
3. Deepening of mentolabial sulcus
4. Deepening of nasolabial fold
Prosthodontics
Answer: 1
As lower denture settles down due to ridge resorption, the effect is a prominent chin.
Secondary Impression material for edentulous pt with hyper gag reflex?
1) Alginate
2) Silicon rubber base
3) Plaster of paris
4) ZOE
Prosthodontics
Answer: 2
Secondary impression material for edentulous patients with hyper gag reflex is silicon rubber base.
Because of the great length of this clasp it must be designed with additional sup port, usually in the form of an auxiliary bracing arm. Which clasp is this?
1. Ring clasp
2, Combination clasp
3. Fish hook clasp
4. Multiple circlet clasp
Prosthodontics
Answer: 1
A ring clasp is a type of clasp used in removable partial dentures that encircles the abutment tooth. Due to its length and the potential for movement, it often requires additional support, typically provided by an auxiliary bracing arm, to ensure stability and retention of the prosthesis. This design helps distribute forces more evenly and prevents dislodgment during function.
Which of the following is most likely to occur if attachment epithelium is removed during curettage
1. Deepening of pockets
2. Decrease in pocket depth
3. Resorption of alveolar bone
4. Deposition of alveolar bone
Prosthodontics
Answer: 2
Which of the following is most likely to occur if attachment epithelium is removed during curettage: deepening of pockets.